๐Ÿ’กap physics c: e&m review

Time Constant

Written by the Fiveable Content Team โ€ข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated September 2025

Definition

The time constant represents how quickly or slowly an exponential process occurs within an RC circuit. It determines how long it takes for voltage across a charging or discharging capacitor to reach approximately 63% of its final value.